Ring-forming apparatus.



Patented July 28, 1914.

.20 ./lllllllHr f l H. HENRIGH.

RING FORMING APPARATUS.

APPLICATION FILED DBO.15,1910.

Urin o site ES `TET FFICE.

HENRY HEINRICH, OF NEW YORK, N. Y

RING-FORMING APPARATUS.

To all whom t may concern lie it known that HENRY Heumen, of New York, in the county of New York and in the State of New York, have invented a certain new and useful Improvement in Ring-Forming Apparatus, and do hereby declare that the following is a full, clear, and. eXact description thereof.

My invention relates particularly to the provision o'll dies for forming iinger rings, and the apparatus used in connection with the same.

The object of my invention is to simplify the construction oit' the dies to make them much stronger by avoiding the use of springs in the dies proper, etc., and by providing means for insuring that the central opening in the formed blank is perfectly cylindrical.

I have shown one embodiment of my invention in the accompanying drawings, in which- Figure 1 is a vertical section oit the apparatus showing the blank after the completion oit the first forming operation; Fig. 2 is a similar section showing the blank at'ter the completion of the second forming operation; Fig. 3 is a similar section showing the blank after the completion ot' the third and last forming operation; Fig. 4t is a vertical section of the flat blank in the shape of a washer; Fig. 5 is an elevation of the blank after the first forming operation; Fig. 6 is an elevation of the blank after the second forming operation; and Fig. 7 is an elevation of the completed formed blank.

In the drawings, 1 represents a metal base. The base 1 has two slots 2 to receive bolts or other means for attaching it to its suppoit. At the center of the base 1 there is a raised portion 3 having a central opening l to receive a female die 5 having a conical opening 5 at its center. At one side of the opening 4 there is located a sliding block 6 rendered adjustable by means of a screw 7. By operating the screw 7, the female die 5 may be secured tightly in position. The cylindrical opening S extends from the center of the opening l through the base 1 and at the top of the opening 8 there is located a cylindrical shoulder 9. The shoulder 9 is designed to support a barrel 10 carrying a spring pressed plunger 11 which is screwthreaded on its lower end to receive a nut 12. The plunger 11 is designed to yieldingly support a center pin 13. A male die 14: is

Specification of Letters Patent.

Application filed December 15, 1910.

Patented July 28, 1914.

Serial No. 597,452.

provided, which comprises a shank 15 to be held in a power punch or other apparatus ior operating the male die, a conical projection 1.(5 at the lower end ot.' the die and a shoulder 17, located above the conical projection 1 (3. It will be noted that the projection 1G is comparatively long for a reason to be hereinafter referred to. The only other apparatus required is a flat punch 18 which has a shank 19;

In the operation ot my apparatus, a blank Q0 in the shape of a washer is punched out oli' a flat sheet ot' metal. rPhe female die 5 is then placed in the base 1, the spring pressed plunger 1l being omitted. The blank 20 is then placed in the conical opening 5 of the female die 5, and the inale die 111 is pressed downwardly upon the blank 2O until the blank assumes the shape o t' the conically rlormcd blank 2l; l The conical projection 16 is longer than the width ot' any one side of the blank 20 so that during the formation of the conically formed blank 21 the shoulder 17 will i'all upon the upper edge of the conically formed -blank 21. Il the conical projection 1G were shorter, the operation could not possibly be performed in this way, but the shoulder 17 would then fall opposite some portion of the body of the blank 20 in :forming the conically formed blank 21. A't'ter this, the barrel 10 carrying the spring pressed plunger 11 is inserted into the base 1 with the female die The center pin 13 is then supported upon the spring pressed plunger 11, the conically formed blank being placed over the pin 18 with its smaller diameter pointed upward. The flat punch 18 is now brought down upon the blank 21 and as a result the formed blank 22 is pro duced, having a central ridge located slightly above its center and two conical surfaces ending in said ridge. The formed blank 22 is now turned over or reversed. in the female die 5 and the operation with the flat punch 1S repeated. This results in producing a blank 23 having a ridge located exactly in the center with symmetrical conical surfaces ending in the ridge. In this shape the blank is in a convenient condition Ylor rolling and is of such a character that the percentage of loss is small in finishing the ring. The use of the center pin 13 also in sures that the central opening of the blank 23 is exactly cylindrical, which is a very important matter in the manufacture of finger rings.

within the` scope of the appended claims Without departing from the spirit of my invention.

I claim:

1. In a finger ringforming apparatus a female die and a male die having a conical seat for the Whole. interior surface of the ring and an annular seat at the base of the cone extending around said first mentioned seat. l

2; In a linger ringeforming apparatus a female die having a tapered seat for the ring and a male die having`- a conical seat for the Whole interior surface of the ring g said last mentioned seat being similar in g shapeV to the tapered seat and an annular seat at the base of the cone extending around said iirst mentioned seat upon the male die. 3. In afinger ring-forming apparatus, a vfemale die having a conical seat and a male die having a central tapering projection .and an annular seat extending aroundk the same at a point 4opposite the Wider portion of said conical seat, the smallest diameter of the conical set of the female die being Tsmaller than the largest diameter of the lcentralA projection of the male die. In a iinger ring-forming apparatus', a female die having a conical seat, and a male die having a conical projection and an. anin uglar sea-t extending around the same at a `point opposite the vWider portion. of said lconical seat, the smallest diameter of the `gconical seat of the female die being smaller than the largest diameter vof the central pro- Igjection of they male die.

i In testimony that I claim the foregoing I have hereunto set my hand. l y HENRY EEN-RICH. i fitnesses MrNnRVA Loman, M. MEIVKLE.

Copies of this patent- :may be obtained for five cents each, by addressingfthe Commissioner of atents, Waohingtom D. 8.2 

